:root {
  --bg: #0b1020;
  --card: #121a2f;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8edf7;
  --muted: #93a0bb;
  --accent: #5b8cff;
  --accent-2: #7c5cff;
  --success: #3ecf8e;
  --danger: #ff6b6b;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(91, 140, 255, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(124, 92, 255, 0.15), transparent 28%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero { text-align: center; margin-bottom: 28px; }

.hero-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.15);
  color: #b9ccff;
  font-size: 13px;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 2.2rem;
}

.hero-desc {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.card {
  background: rgba(18, 26, 47, 0.92);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

.tab {
  flex: 1;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 15px;
}

.tab.active {
  color: var(--text);
  border-color: rgba(91, 140, 255, 0.5);
  background: rgba(91, 140, 255, 0.12);
}

.panel { display: none; }
.panel.active { display: block; }

.upload-zone {
  display: block;
  border: 2px dashed rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-zone.dragover,
.upload-zone:hover {
  border-color: rgba(91, 140, 255, 0.6);
  background: rgba(91, 140, 255, 0.06);
}

.upload-icon { font-size: 2rem; margin-bottom: 8px; }
.upload-title { font-size: 1.05rem; margin-bottom: 6px; }
.upload-hint { color: var(--muted); font-size: 0.92rem; }
.file-name { margin-top: 10px; color: #b9ccff; word-break: break-all; }

.field { display: grid; gap: 8px; }
.field span { color: var(--muted); font-size: 14px; }

.field input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 15px;
}

.options {
  display: grid;
  gap: 10px;
  margin: 18px 0 20px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.submit-btn {
  width: 100%;
  border: none;
  border-radius: 14px;
  padding: 15px;
  font-size: 16px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.result { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.hidden { display: none !important; }

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.status-label {
  font-weight: 600;
  font-size: 1.05rem;
}

.status-label.pending,
.status-label.running { color: #ffd166; }
.status-label.completed { color: var(--success); }
.status-label.failed { color: var(--danger); }

.source-label { color: var(--muted); font-size: 14px; }

.progress-log {
  background: rgba(0, 0, 0, 0.22);
  border-radius: 12px;
  padding: 14px;
  max-height: 220px;
  overflow: auto;
  font-size: 13px;
  line-height: 1.7;
  color: #c7d2ea;
}

.error-box {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 107, 107, 0.12);
  color: #ffb4b4;
  white-space: pre-wrap;
}

.text-preview {
  margin-top: 14px;
  padding: 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
  font-family: inherit;
  line-height: 1.7;
}

.download-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
}

.footer {
  text-align: center;
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .hero h1 { font-size: 1.7rem; }
  .download-actions { flex-direction: column; }
  .btn { width: 100%; }
}